Flange-facing attachment



April 2, 1929. F. ERF'LE 1,707,716

FLANGE FAC ING ATTACHMENT Filed July 22, 1926 3 Sheets-Sheet 1 m I wwmq April 2, 1929. ERFLE 1,707,716

FLANGE FACING ATTACHMENT Filed July 22, 1926 3 Sheets-Sheet 2 April 2, 1929. F. ERFLE 1,707,716

FLANGE FAG ING ATTACHMENT Filed July 22, 1926 3 Sheets-Sheet 3 Patented Apr. 2, 1929.

. -'UNITED STATES FREDERICK ERFLE, OF PHILADELPHIA, PENNSYLVANIA.

GE-FACIN G ATTACHMENT.

Application filed July 22,

My invention relates to facing machines and more particularly to attachments for facing the flanges of large pipe. l

The principal object of my invention 1510 5 provide an attachment which may be readily secured to the face plate of a lathe or simllar machine tool.

- A further object is to so construct the attachment that it is easily operated and may be adjusted to face the flanges with the greatest precision.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being had to the accompanying drawings in which Figure 1 is a fragmentary plan View of a lathe on which my attachment has been installed and showing a section of pipe secured to the lathe,

Figure 2 is an elevation of the in Figure 1,

Figure 3 is a front view of the face plate shown in Figure 1, drawn on an enlarged scale F igure 4 is a side View of the grinding bracket taken on line 4-4 of Figure 3,

Figure 5 is a section on line 55 of Figure 4, Figures 4 and 5 being drawn to a still larger scale Y Figure 6 is an enlarged view of the tool post, taken on line 66 of Figure 3,

Figure 7 is a fragmentary sectional view of a pipe and flange, and I Figure 8 is a sectional View taken on hne 88 of Figure 3, Figures 7 and 8 being drawn on a larger scale than Figure 3.

Flanges for large pipe are usually faced and the inner corner chamfered as shown at 9 in Figure 7 and two slight grooves are cut in the inner wall of the flange as indicated at 10. The pipe is then put in a machine and the metal pressed into the grooves 10 and over the chamfered part 9 by means of rollers working under heavy pressure. This distorts the face of the flange to such an extent that a tight joint cannot be made. Consequently it is necessary to face the part 11, usually by hand, either by scraping or stoning. The parts 12 and 13 have originally been turned down lower than the part 11 so that when finished there will be a difference in elevation of approximately .005 of an inch. The principal object of my invention is to overcome this hand work and to so accurately finish the flange that perfect joints are possible when the pipes are assembled.

lathe shown 1926. Serial No. 124,123.

Referring more particularly to the drawlugs, 14 represents the face plate of an ordinary lathe. Only a part of the lathe has been shown and none of it will be described as it is a well known machine and forms no part of my invention. one of the slots of the face plate by means of bolts 16; The grinder consists of a flanged bracket 17, having a longitudinal groove 18, on which is mounted a sliding block 19 having a tongue 18*, engaging the groove 18, and

shoulders 20, between which abearin block 21 is slidably mounted and held in ace by gibs 22. The shoulders 20 are sli" tly'less in height than the base section 23 of the bearing block 21 so that when wing nuts 24 are tightened down on the screws 25, the gibs 22 will pinch the base section between the gibs and the top of the sliding block 19. The block 19 is secured against transverse movement by means of the bolt 27 which passes through slot 28 in the bracket 17. Transverse adj ustment is obtained by means of the screw 29 which passes through a bearing 30 in an angle 31, which is bolted to the bracket 17' by means of the bolts32. The screw 29 is held against longitudinal movement by the hand wheel 33 and collar 33 abutting opposite sides of the angle 31. A set screw 34 is provided for holding the screw 29 against rotation. The screw 29 engages a threaded aperture 35 in the block19 and a nut 36 is '15 is a grinder secured in.

provided for additional locking means.

Mounted in the bearing block 21 is a shaft 37, on the shoulderedouter end of which is secured a grinding wheel 38 by means of a nut 39. Pulley 40 is mounted near the center of the shaft and rotates between the two bearing portions 41 of the block 19. The bearing block 211s adjusted longitudinally by means of the screw 42 engaging a threaded aperture 43 in bearing sections 41 and being secured between the collar 44 and the handwheel 45 located on either side of the flange 46 which forms a partof block 19. Motion is imparted to the grinding wheel 38 by means of a belt 47 passing over pulley 40 and engaging a larger pulley 48 mounted in one of the slots of the face plate. Secured to pulley 48 is a smaller pulley 50, which is driven by belt 51 passing over a pulley attached to the motor 52 which is secured in one of the slots of the face plate; the motor pulley being larger than pulley 50. Slack in the belt 51 is taken up by means of pulley 53 mounted on a standard 54 attached to the face plate 14,

spring 61 surrounding its reduced portion,

and bearing against the shoulder 62 and a plate 63 secured to the bracketbyinea'ns of bOlts (i l.

The outer end of the plunger 60 v is bifurcated and a pulley 65 is secured in this portion by means of a pin 66. The plunger is held against rotation bymeans of a bolt 67 passing through through a slot '68 in the plunger While I have described this type of spring idler other types Well.

While the grinder shaft might be connected to themotor by other means, I prefer the belt and pulley connection with the'motor somewhat remote from the grinder bracket as it permits distribution of the weight on the face plate and a wide range of adjustment.

The device is operated in the following manner:

After therflange has been rolled onto the pipe, the pipe placed on the lathe with one end secured to the lathe carriage in any suitable manner and the rear end supported on suitable blocking. The carriage is advanced would answer the purpose equally toward the face plate to approximately the correct distance and,- by rotating the face plate in the proper direction, a cut is taken across the flange with a tool 69 secured in a tool post 70, whichhas not been described as it is a well known construction. When it is evident that all portions of the surface 11 are in the same plane, the portions 12 and 13 thearm 58 and are turned down approximately .005 of an inch below the portionll. The tool 69 is then backedup and the grinding wheel 38 adjusted, by means of the-screws 42 and 29, so that it will grind and polish the portion 11 of the flange to an absolutely true surface.

By adjustably mounting all parts of my facing attachment in the usual slots of the face plate of a lathe or similar machine tool the attachment is adapted for use upon flanges of a wide range of sizes of pipes.

lVhile I have described my attachmentin detail, I wish it understood that it is subj set to such changes as fairly come within the scope of the appended claim.

I claim 7 it flange facing attachment for lathes consisting of a bracket adapted to be adjustably securedin one of the slots of the face plate of a lathe; a block slidable thereon in a plane parallel to the face plate; bearing block slidable on the first named block in a plane perpendicular tothe face plate; a shaft carried by the last named block; a grinding wheel fixed to the shaft; inc-ans for adjusting the position of the blocks; I means for locking them in adjusted position; a motor adapted to be secured in one of the slots of the face plate and a pulley on the motor shaft; a

pulley mounted in therbearing block; an intermediate pulley adjustably mounted-in one of the slots in the face plate, belts connecting the pulley on the motor shaft with the intermediate pulley and the intermediate pulley with the pulley in the bearingblock; means mounted in slots in the face plate for tightening the belts, and means for actuating the motor. V

In testimony whereof I have signed my name to this specification V FREDERICK Earns; 

